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SHARE CAPITAL, OPTION PLANS AND SHARE-BASED PAYMENTS - Schedule of Weighted-Average Fair Value Of Options And Weighted-Average Assumptions Used (Details) - $ / shares
3 Months Ended 9 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2023
Mar. 31, 2022
Stock Options (issued under Stock Option Plans)        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Weighted-average fair value of options granted (in dollars per share) $ 7.94 $ 8.31 $ 6.61 $ 9.08
Weighted-average assumptions used:        
Expected volatility 29.66% 26.06% 28.65% 26.37%
Risk–free interest rate 3.82% 1.54% 4.00% 1.06%
Expected dividend yield 2.74% 1.94% 3.10% 1.75%
Expected life (in years) 4 years 2 months 15 days 4 years 1 month 20 days 4 years 2 months 12 days 4 years 1 month 24 days
Forfeiture rate (based on historical rates) 7.00% 7.00% 7.00% 7.00%
Average exercised share price (in dollars per share) $ 34.70 $ 44.45 $ 30.69 $ 48.69
PSUs        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Weighted-average fair value of options granted (in dollars per share)     $ 8.09  
Weighted-average assumptions used:        
Expected volatility     26.00%  
Risk–free interest rate     3.21%  
Expected dividend yield     2.00%  
Average exercised share price (in dollars per share)     $ 31.89  
Granted (in dollars per share)     $ 54.46  
Derived service period (in years)     1 year 8 months 12 days  
PSUs | Long Term Incentive Plan        
Weighted-average assumptions used:        
Expected volatility       28.00%
Expected dividend yield     0.00%  
Expected life (in years)     3 years 1 month 9 days 3 years 1 month 6 days
PSUs | Maximum | Long Term Incentive Plan        
Weighted-average assumptions used:        
Expected volatility     31.00%  
Risk–free interest rate     3.39% 0.71%
Expected dividend yield       1.80%
Granted (in dollars per share)     $ 55.06 $ 75.15
PSUs | Minimum | Long Term Incentive Plan        
Weighted-average assumptions used:        
Expected volatility     29.00%  
Risk–free interest rate     3.13% 0.45%
Expected dividend yield       1.70%
Granted (in dollars per share)     $ 43.10 $ 69.78
Restricted Share Units        
Weighted-average assumptions used:        
Granted (in dollars per share)     30.43  
Restricted Share Units | Long Term Incentive Plan        
Weighted-average assumptions used:        
Granted (in dollars per share)     38.81  
Deferred Share Units (DSUs)        
Weighted-average assumptions used:        
Granted (in dollars per share)     $ 29.19